package com.itheima.reggie.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.ResultInfo;
import com.itheima.reggie.domain.Category;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.util.List;

@Service
@Transactional
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public List<Category> findAll() {
        return categoryMapper.findAll();
    }

    @Override
    public void save(Category category) {
        //补齐参数
        //调用方法保存
        categoryMapper.save(category);
    }

    @Override
    public void update(Category category) {
        categoryMapper.updateById(category);
    }

    //Id---category的id
    @Override
    public void deleteById(Long id) {
        //2.根据分类id去套餐表中统计此分类id下的套餐数量，如果数量>0，就返回提示
        Integer num1 = categoryMapper.countDishByCategoryId(id);
        if (num1 > 0) {
            throw new CustomException("此分类下存在菜品，不允许删除");
        }
        //2.根据分类id去套餐表中统计此分类id下的套餐数量，如果数量>0，就返回提示
        Integer num2 = categoryMapper.countSetmealByCategoryId(id);
        if (num2 > 0) {
            throw new CustomException("此分类下存在套餐，不允许删除");
        }
        //3.根据分类id从分类表中删除
        categoryMapper.delete(id);
    }

    @Override
    public List<Category> finByType(Integer type) {
        //条件：select * from category where type = #{}
        LambdaQueryWrapper<Category> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Category::getType, type);

        return categoryMapper.selectList(wrapper);
    }


   /* @Override
    public ResultInfo deleteById(Long id) {
        //2.根据分类id去套餐表中统计此分类id下的套餐数量，如果数量>0，就返回提示
        Integer num1 = categoryMapper.countDishByCategoryId(id);
        if (num1 > 0) {
            return ResultInfo.error("此分类下存在菜品，不允许删除");
        }
        //2.根据分类id去套餐表中统计此分类id下的套餐数量，如果数量>0，就返回提示
        Integer num2 = categoryMapper.countSetmealByCategoryId(id);
        if (num2 > 0) {
            return ResultInfo.error("此分类下存在套餐，不允许删除");
        }
        //3.根据分类id从分类表中删除
        categoryMapper.delete(id);
        return ResultInfo.success(null);
    }*/
}
